Selection Tables

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5/8″ Bolt or dowel
Double Shear, D. Fir-L lumber to 6 mm steel plates
Wood Member Fastener
Thickness
(mm) 		Depth
(mm) 		No.
of
rows 		No. of fasteners in a row
2 3
Bolt spacing in a row taken as the minimum of the loaded end distance3, aL, and the spacing between bolts in a row, SR (mm)
64 95 127 159 190 64 95 127 159 190
38 89 1 0 7.70(R) 11.6(R) 15.4(R) 19.3(R) 19.9(c) 11.6(R) 17.3(R) 21.2(T) 21.2(T) 21.2(T)
38 184 2 47.625 12.3(G) 16.1(G) 20.0(G) 23.8(G) 27.7(G) 16.1(G) 21.9(G) 27.7(G) 33.5(G) 35.3(T)
38 184 2 79.375 15.4(R) 21.0(G) 24.9(G) 28.7(G) 32.6(G) 21.0(G) 26.8(G) 32.6(G) 35.3(T) 35.3(T)
38 235 2 111.125 15.4(R) 23.1(R) 29.8(G) 33.6(G) 37.5(G) 23.1(R) 31.7(G) 37.5(G) 43.3(G) 43.5(T)
38 235 3 47.625 16.9(G) 20.7(G) 24.6(G) 28.4(G) 32.3(G) 20.7(G) 26.5(G) 32.3(G) 38.1(G) 39.6(T)
38 235 3 62.5 21.5(G) 25.3(G) 29.2(G) 33.0(G) 36.9(G) 25.3(G) 31.1(G) 36.9(G) 39.6(T) 39.6(T)
89 89 1 0 18.0(R) 27.1(R) 36.1(R) 45.1(R) 46.6(c) 27.1(R) 40.6(R) 49.6(T) 49.6(T) 49.6(T)
89 184 2 47.625 28.8(G) 37.8(G) 46.8(G) 55.8(G) 64.9(G) 37.8(G) 51.3(G) 64.9(G) 78.4(G) 82.6(T)
89 184 2 79.375 36.1(R) 49.3(G) 58.3(G) 67.3(G) 76.3(G) 49.3(G) 62.8(G) 76.3(G) 82.6(T) 82.6(T)
89 235 2 111.125 36.1(R) 54.1(R) 69.8(G) 78.8(G) 87.8(G) 54.1(R) 74.3(G) 87.8(G) 101(G) 102(T)
89 235 3 47.625 39.5(G) 48.6(G) 57.6(G) 66.6(G) 75.6(G) 48.6(G) 62.1(G) 75.6(G) 89.1(G) 92.7(T)
89 235 3 62.5 50.3(G) 59.3(G) 68.3(G) 77.3(G) 86.4(G) 59.3(G) 72.8(G) 86.4(G) 92.7(T) 92.7(T)
140 140 1 0 22.4(R) 33.6(R) 44.8(R) 52.2(g) 52.2(g) 33.6(R) 50.4(R) 67.2(R) 76.0(T) 76.0(T)
140 191 2 47.625 33.5(G) 44.7(G) 55.9(G) 67.1(G) 78.3(G) 44.7(G) 61.5(G) 78.3(G) 89.2(T) 89.2(T)
140 191 2 79.375 44.8(R) 56.5(G) 67.7(G) 78.9(G) 89.2(T) 56.5(G) 73.3(G) 89.2(T) 89.2(T) 89.2(T)
140 241 2 111.125 44.8(R) 63.8(G) 75.0(G) 86.2(G) 93.9(T) 63.8(G) 80.6(G) 93.9(T) 93.9(T) 93.9(T)
140 241 3 47.625 41.6(G) 52.8(G) 64.0(G) 75.2(G) 85.7(T) 52.8(G) 69.6(G) 85.7(T) 85.7(T) 85.7(T)
140 241 3 62.5 51.3(G) 62.5(G) 73.7(G) 84.9(G) 85.7(T) 62.5(G) 79.3(G) 85.7(T) 85.7(T) 85.7(T)
191 140 1 0 30.6(R) 45.8(R) 52.2(g) 52.2(g) 52.2(g) 45.8(R) 68.8(R) 78.3(g) 78.3(g) 78.3(g)
191 191 2 47.625 45.7(G) 61.0(G) 76.2(G) 91.5(G) 104(g) 61.0(G) 83.9(G) 107(G) 122(T) 122(T)
191 191 2 79.375 61.1(R) 77.1(G) 92.4(G) 104(g) 104(g) 77.1(G) 100(G) 122(T) 122(T) 122(T)
191 241 2 111.125 61.1(R) 91.7(R) 104(g) 104(g) 104(g) 91.7(R) 116(G) 139(G) 147(T) 147(T)
191 241 3 47.625 60.8(G) 76.1(G) 91.4(G) 107(G) 122(G) 76.1(G) 99.0(G) 122(G) 135(T) 135(T)
191 241 3 62.5 75.9(G) 91.2(G) 106(G) 122(G) 135(T) 91.2(G) 114(G) 135(T) 135(T) 135(T)
241 140 1 0 38.6(R) 52.2(g) 52.2(g) 52.2(g) 52.2(g) 57.8(R) 78.3(g) 78.3(g) 78.3(g) 78.3(g)
241 191 2 47.625 57.6(G) 76.9(G) 96.2(G) 104(g) 104(g) 76.9(G) 106(G) 135(G) 141(T) 141(T)
241 191 2 79.375 77.1(R) 97.3(G) 104(g) 104(g) 104(g) 97.3(G) 126(G) 141(T) 141(T) 141(T)
241 241 2 111.125 77.1(R) 104(g) 104(g) 104(g) 104(g) 116(R) 147(G) 157(g) 157(g) 157(g)
241 241 3 47.625 76.7(G) 96.0(G) 115(G) 135(G) 154(G) 96.0(G) 125(G) 154(G) 170(T) 170(T)
241 241 3 62.5 95.8(G) 115(G) 134(G) 154(G) 157(g) 115(G) 144(G) 170(T) 170(T) 170(T)
292 140 1 0 46.7(R) 52.2(g) 52.2(g) 52.2(g) 52.2(g) 70.1(R) 78.3(g) 78.3(g) 78.3(g) 78.3(g)
292 191 2 47.625 66.8(G) 90.2(G) 104(g) 104(g) 104(g) 90.2(G) 125(G) 135(T) 135(T) 135(T)
292 191 2 79.375 88.2(G) 104(g) 104(g) 104(g) 104(g) 112(G) 135(T) 135(T) 135(T) 135(T)
292 241 2 111.125 93.5(R) 104(g) 104(g) 104(g) 104(g) 140(R) 157(g) 157(g) 157(g) 157(g)
292 241 3 47.625 92.9(G) 116(G) 140(G) 157(g) 157(g) 116(G) 151(G) 186(G) 187(T) 187(T)
292 241 3 62.5 116(G) 139(G) 157(g) 157(g) 157(g) 139(G) 174(G) 187(T) 187(T) 187(T)

Notes:

  1. The tabulated values are the minimum of the yielding resistance, row shear, group tear-out and net tension resistances of the wood member, and are applicable to tension members.  For compression members, the values are conservative when the governing failure mode is indicated as group tear-out or net tension since the resistance is based on yielding and row shear only.
  2. The governing failure mode for each connection configuration is denoted either by lowercase letter (a)-(g), indicating the specific yielding failure mode as per O86 Clause 12.4.4.3.2, or by uppercase letter  ®, (G) or (T), indicating failure due to row shear, group tear-out or net tension in the main member.
  3. The minimum loaded end distance, aL, is the maximum of 50 mm and 5 times the fastener diameter (O86 Clause 12.4.3.1).
  4. For the calculation of group tear-out and net tension resistances, the fastener hole diameter is assumed to be 2 mm larger than the fastener diameter.
  5. The connection resistance P'r is required to be adjusted to end-use conditions using modification factors depending on the governing failure mode as follows:
    • Pr = P'r for yielding failure mode (a),
    • Pr = P'r (KD KSF KT) for yielding failure mode (c),
    • Pr = P'r (KDy KSF KT) for yielding failure mode (d) or (g),
    • Pr = P'r (KD KSv KT) for row shear,
    • Pr = P'r (KD KSt KT) for group tear-out or net tension.

    Modification factors are provided in Section 7.4 of the Wood Design Manual 2020. For untreated wood members under standard-term loading and dry service conditions, the modification factors are 1.0.

  6. Tabulated values are based on No.1/ No.2 grade for dimension lumber (38 to 102 mm in smaller dimension) and No.2 grade for timbers (114 or more in smaller dimension).
  7. Tabulated values are based on ASTM A307 grade steel bolts or dowels, and ASTM A36/A36M grade steel plate. The resistance of steel plate needs to be checked separately.
  8. A single steel splice plate is not permitted to be used for multiple rows of bolts or dowels when the distance between the two outer rows exceeds 125 mm.
  9. N/A = not applicable.
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